ALL PLIERS MUST HAVE A LOOP END! I usually have to weld a metal loop to a flat handle. I work with sheet metal (mainly overhead lines) and it's important to be able to tighten the clamps after they're installed. They are ideal for applications such as installing TDF ducts. or mating flanges together. The locking feature is amazing too, it really gives a sense of security when working with heavier parts. Everyone I work with has commented on these pliers, too bad they're not that easy to buy.